JPS62201782A - Control operation method at time of earthquake of elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an earthquake control operation method for elevators.

[Conventional technology and interjugular point]

Generally, when operating an elevator during an earthquake, an earthquake sensor is installed at an appropriate location in the building where the elevator is installed, and earthquake control operations such as stopping the elevator at the nearest floor are performed in conjunction with this earthquake sensor. It is.

Figure 1 shows an example of a conventional earthquake control operation system.

In Fig. 1, 1 is an earthquake sensor that outputs a signal 1a according to the vibration level, 2 is a preamplifier (AC amplifier) that amplifies the signal 1EL, and 3 and 4 are each set to a certain set value (for example, a special Comparators 5 and 6 provided with a low setting value and a low setting value are respectively output circuits and output a signal 5!L or 6a, respectively, when the output of the preamplifier 2 is larger than the setting value of the hum comparator 3 or 4.

Reference numeral 7 denotes a control operation command device that outputs control operation command signals such as a nearest floor stop command 7a or an operation suspension command 7b in response to a signal 5a or 6a.

The above-mentioned special low setting value formula or low setting value is defined as a setting value of an earthquake sensor in the "Seismic Design and Enforcement Guidelines for Elevators" based on the Enforcement Order of the Building Standards Act.

In the above configuration, when an earthquake occurs, a signal output from the earthquake sensor 1 becomes a signal 2a amplified by the preamplifier 2, and is input to the comparator 3 or 4, respectively. When the seismic acceleration exceeds the extra-low set value, a signal 5a is input to the control operation command device 7 via the comparator 3 and the output circuit 5, and a nearest floor stop command 7a is output. Furthermore, when the seismic acceleration exceeds the low set value, a signal 6a is similarly input to the control operation command device 7 via the comparator 4 and the output circuit 6, and an operation suspension command 7b is output. “As can be seen from this example, in conventional earthquake control operation, if the detected acceleration of the earthquake sensor does not reach the extra low setting value, normal operation will continue even if an earthquake is occurring. , the following inconvenience occurs.This will be explained using FIG.

FIG. 2 shows a general earthquake waveform with time t plotted on the horizontal axis and acceleration a plotted on the vertical axis.

In Fig. 2, 11 is the extra low setting value of comparator 3;
L2 is the low setting value of comparator 4, tl is the time when the car closes the door and starts running, t2 is the time when comparator 6 is activated, t3 is the time when the nearest floor has stopped, t4 is the time when comparator 4 is activated, and T1 is the time when the car starts running. is stopped at the boarding area, T2
Each section shows the section in which the basket is running.

Consider the case where an earthquake as shown in Figure 2 occurs during conventional earthquake control operation. Time t.

An earthquake has already occurred while the previous car was stopped at the landing, but at this point the acceleration detected by the earthquake sensor has not reached the extra-low setting value L1, so normal operation continues, and control is continued. If there is a running command from the device, the car will start running. Afterwards, while the elevator is running, the seismic motion becomes large, and when the vibration level reaches the special low setting value of 7 or higher, the elevator enters controlled operation and the car stops at the nearest floor. It is conceivable that the seismic acceleration could become quite large, and passengers would remain in a state of anxiety about being crushed until they reach the nearest floor.

When the vibration level becomes equal to or higher than the low set value L2, the elevator enters the out-of-operation state.

In this way, in conventional earthquake control operation, normal operation continues until the vibration level reaches the extra-low set value, so even though an earthquake is occurring, the car is loaded with passengers and departs.
As a result, there was a problem in that the passengers were placed in a very dangerous situation. In addition, running the car while swinging has the problem that there is a high possibility that the wire rope will come off the sheave, or the car or counterweight will come off the rail.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems, and is characterized by having means for detecting seismic motion of a certain level or higher below an extra-low setting value, and when the car is stopped, the extra-low setting value When an earthquake is detected, if the door is open, the door opening time will be extended for a certain period of time, if the door is closed, the door will be opened, and the door will remain open for a certain period of time, thereby delaying the start of the elevator run. That's what I did.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. Incidentally, although it is possible to detect vibrations below the extra-low setting value using only the comparator, in the following embodiments, detection is performed only when a certain degree of vibration continues. By doing this, it is possible to prevent false detections and to extend the door opening time only when it is expected that the vibrations will become large later.

FIG. 3 is a block diagram showing an earthquake control operation system for carrying out the present invention, and FIG. 4 is a diagram corresponding to FIG. 2 for explaining the relationship between seismic waveforms and the operation of the present invention. Note that the first
Components that are the same as those in the figures and FIG. 2 are designated by the same reference numerals.

In FIGS. 3 and 4, 8 is a seismic motion discriminator for detecting seismic motion below the extra-low set value, 9 is an envelope detection circuit that outputs the envelope of the output signal of the preamplifier 2, and 10
is a certain set value below the extra-low set value (a value as low as possible is desirable within the range that does not falsely detect vibrations other than earthquake motion)
11 is a timer that operates for a certain period of time according to the output from comparator 1. 12 is a timer 11.
13 is a comparator provided with a certain set value, 14 is a signal 14a when there are outputs 10a and 13a of the comparators 10 and 13, respectively. The output AND circuit, 7C, is the door opening extension command output from the control operation command device 7 by the signal 14a, L3 is the extra low setting value, and the setting value of the comparator 10 provided below is t.
'1 indicates the operating time of the seismic motion discriminator 8, T/, the normal operation section, and T'2 the extended door opening section.

Next, the operation of the above configuration will be explained.

When an earthquake occurs while the car is stopped and the output of the envelope detection circuit 9 exceeds the set value L3 of the comparator 10, the comparator 10 outputs a signal 10a. The timer 11 operates for a certain period of time in response to the signal 10a, and the integrating circuit 12 integrates the output of the envelope detection circuit 9 during this period. If the output of the integrating circuit 12 exceeds the set value of the comparator 13, and at this point the output of the envelope detection circuit 9 exceeds the set value of 53 of the comparator 10φ, the AND circuit 14 outputs the signal 14a.
is output. In other words, the seismic motion discrimination device 8 uses the set value L
The signal 14a is output when the acceleration exceeding 3 continues to some extent and there is a high possibility that the vibration level will reach the extra-low set value or higher. In response to the signal 14a, a door open extension command signal 7c is output from the control operation command device 7, and when the door is opened, the door open state is extended for a certain period of time, and when the door is closed, the door is opened and the door open state is continued for a certain period of time.

Therefore, the departure of the car will be delayed for a certain period of time, and if the seismic motion reaches the set value or exceeds L2 during that time, the operation will be switched to the same controlled operation as before, but it is safe because the car has not departed yet.

Also, if the acceleration does not exceed the set value L1 within this certain period of time, the door opening extension command is canceled and normal operation is resumed.
As explained above, if the set value L3 is exceeded while the car is running, it is possible to immediately stop at the nearest floor, but it is possible to stop first in response to a hall call or a car call. After the door is opened, the door opening time may be extended for a certain period of time. Furthermore, in order to eliminate the sense of suspicion among passengers, a display regarding the occurrence of an earthquake may be displayed at the landing or inside the car when the doors are left open for an extended period of time.

〔Effect of the invention〕

According to the present invention, it is possible to prevent a situation in which a passenger gets into a car during an earthquake, and after the car departs, the vibration level increases and the car enters a controlled operation, which puts the passengers in a dangerous situation. It has a great effect on improving sexual performance.

[Brief explanation of drawings]

Figure 1 is a diagram showing a conventional earthquake control operation system, Figure 2 is a diagram showing the relationship between seismic waveforms and conventional control operation, and Figure 3 is an earthquake control operation system for implementing the present invention. The block diagram shown in FIG. 4 is a diagram showing the relationship between seismic waveforms and controlled operation according to the present invention. 102. Earthquake detector 200. Preamplifier 5.4, 10, 13. ,, comparator 5.6. ,,output circuit 710. Control operation command device 801. Earthquake motion discrimination device 910. Envelope detection circuit 11, , timer 12, , integrating circuit 14, , AND circuit

Claims (1)

[Claims] A building equipped with an earthquake detector and operated in conjunction with the earthquake detector to control elevators during an earthquake is equipped with means for detecting vibrations above a certain level below the extra-low set value, An earthquake control operation method for an elevator, characterized in that when a door is detected while the elevator is stopped, the door opening time is extended for a certain period of time.